Chuck



M. MGANLY. Chuck. l

No. 224,345. Patented liep-1o, 1880.

umu mm N-PEYEIIS. PHOTO-LITHOGRAFHER. WASHINGTON. D. Gy

, 6, a sectional view ofthe saine, showing the' UNITI-3D VSTATES PATENT OFFICE.

MILTON MGANLY, OF FORREsTON, ILLINOIS.

CHUCK.

SPECIFICATION forming part of Letters Patent No. 224,345, dated February 10, 1880,

Application filed October 2li, 1879.

To all whom 'it mal/y concern Be it known that I, MILTON MOANLY, of Forreston, in the county of Ogle and State of Illinois, have invented certain new and useful' Improvements in Chucks; and I do hereby declare the following to be a full, clear, and exact description of the inventiomsuch as will enable others skilled in the art to which it appertains to make and use the same, reference being had tothe accompanying drawings, and to letters of reference marked thereon, which form a part of this specication.

This in vention relates to chucks especially adapted for jewelers use, but which may be employed for other purposes; and it consists in an improvement upon a chuck patented by me September 10, 1878, numbered 207,882, which improvement will be fully hereinafter described, Vand particularly pointed out in the claims.

spective View of my improvedhuck and the key by which the gearing is operated to open and close the clamps. Fig. 2 represents alongitudinal section of the chuck, showing a modification of the clamps. Fig. 3 represents a transverse section of the chuck. Fig. 4 represents a detached view of one of the side plates of the chuck, showing the gearing by which the clamps are operated; Fig. 5, a detached view of one ofthe clamps; and Fig.

threaded recess in which one of the operatin gscrews works.

All of the parts of my improved chuck are constructed of steel.

rIhe letter A indicates the supportin g-frame of the chuck, which is a casting provided with a boss, a, having a recess, b, by means of which it may be fitted upon the mandrel of a lathe. Said frame Ais provided with jaws c c, having a space between, in which the clamps B are accurately iitted and adapted to work.

The letter D represents two side plates, secured to opposite sides of the jaws c c by means of screws e or otherwise, the rear ends of said plates resting against shoulders g on the frame A, to hold said plates against longitudinal strain. Each plate is provided on its 5o inner side with a recess or series of recesses,

h, in which the cog-wheels and pinions for opmay be operated by means of a suitable key,

F. The said pinions t' intermesh respectively with the cog-wheels l, which are journaled in their respective recesses in the side plates, D, and these cog-wheels intermesh with the pinions m at each side, the said pinions m being secured to the screws ,-whioh work in the screw-threaded apertures or recesses o in the clamps B, whereby said clamps may be made to approach to Or recede from each other uniformly,the screws of one clamp being lefthanded and the other right-handed for this purpose. The said screws are provided with journals fr at their outer ends, which have their bearings in the opposite plates D, and are confined therein by means of the broad-headed screws s, which turn freely with the journals.

The clamps are interchangeable, and, as shown in Fig. 2, project beyond the face of the clutch, and are provided at their forward ends with segmental recesses t, in order that they may hold wheels of different sizes at their peripheries. As shown in Figs. 5 and 6, the clamps are of such length as to be iiush with the forward face of the chuck when in place,

and are provided with a V-shaped longitudinal groove, in order to grasp and hold the shaft of a` pinion or wheel or the shank of al ther explanation. 1

' 95 It will be perceived that by reason of the uniform movement of the clamps to and from each other the chuck will be self-centering, and will form an accurate and easily-adjusted chuck specially adapted to line work.

IOO

Having thus fully described my invention, end. the cog-Wheels in which said pinions in- What; I claim, and desire to secure by Letters termesh, and the pinions ou the adjusting- Patent, is screws of the clamps, the Whole arranged to 1. ln combination with the clamps of a operate substantially as specified. 15

5 chuck, the adjusting right and left; handed In testimony that I claim the foregoing I screws, provided with journals at their ends, have hereunto set; my hand this 17th day of and confined in their bearings in the side October, 1879.

plates by means of screws, substantially as MILTON MGANLY. specified. Witnesses 1o 2. In combination with the movable clamps, J 0S. A. SKINNER, the key-shaft; provided with pinions near each SAML. ULRICH. 

